传统吸附剂只能对染料进行吸附而无法兼顾染料的降解。将二茂铁(Fc)作为芬顿反应活性基团及交联剂,壳聚糖(CS)作为骨架,通过乳液交联法制备了一种新型功能化多孔微球材料(CS-Fc)。CS-Fc不仅能够对阴离子染料甲基橙(MO)迅速吸附,通过引入催化降解也能够对阳离子染料亚甲基蓝(MB)实现迅速去除。其中,对MO的去除效率从32%提高到了99%,MB从5%显著提高到了99%。CS-Fc/H2O2体系在中性及高浓度废水条件下依然能保持95%以上的高去除率。通过自由基猝灭实验可知,羟基自由基是参与降解的主要活性氧。微球通过简单的离心、水洗快速回收,五次循环后去除率超过85%。这种功能化的绿色环保多孔微球有望成为处理广谱污染物有前途的材料。
Traditional adsorbents can only adsorb pollutants,but cannot degrade them.A novel functionalized porous microsphere material (CS-Fc) was prepared by emulsion crosslinking method using ferrocene (Fc) as Fenton reactive group and crosslinking agent and chitosan (CS) as skeleton.CS-Fc could not only rapidly adsorb the anionic dye methyl orange (MO),but also rapidly remove the cationic dye methylene blue (MB) by introducing catalytic degradation.The removal efficiencies for MO and MB increased from 32% to 99% and from 5% to 99%,respectively.The CS-Fc/H2O2 system could still maintain a high removal rate of more than 95% under neutral and high concentration wastewater condition.Through free radical quenching experiments,it could be seen that hydroxyl radicals were the main reactive oxygen species involved in degradation.Through simple centrifugation and water washing,the removal rate was more than 85% after five cycles.This functionalized green porous microsphere can be a promising material for the treatment of broad-spectrum pollutants.
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基金资助
国家自然科学基金(22072058,21503094)
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